House drain fitting



P 1947 y s. QAVALIERI 2,427,258 HOUSE DRAI-N FITTING Filed June e, 1945INVENTOR.

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Patented Sept. 9, 1947 UNITED STATES PATENT OFFICE 2,427,258. HOUSEDRAIN FITTING Silvestro Cavalieri, Chicago, 111. V Application June 6.1945, Serial No. 597,891

This invention relates to the type of house drain fittings which areplaced in the basement and like floors of buildingsopening on a levelwith the floors, and, provided with sealing gaskets, orificed draingrids or strainer plates, and with removable closure'heads, Y

A fitting of this type is disclosed in my prior patent, No, 1,812,583,issued June 30, 1931. This prior fitting is used in combination with adrainpipe having an expanded annular inlet head arranged on a level withthe floor surface. A circular drain fixture is disposed within theexpanded inlet headof the drainpipe and firmly cemented in placetherewith. The drain fixture is provided with a strainer plate and witha removable cover therefor. Draining of water which accumulates in theplace equipped with the fitting, for example, in the basement, iseffected through the strainer plate upon removal of the cover. Among theadvantages of the prior fitting may be mentioned its structuralsimplicity and ease of installation.

The present invention preserves and retains these advantages andintroduces a number of features which are valuable from the standpointof manufacture as well as installation and safe and eflicient operationof the fitting. Some of the objects and features of the invention arenoted below.

One object of the invention is concerned with.

the provision of an improved drain fitting comprising a tubulargenerally circular shell forming a downwardly extending skirt or apronwhich is disposed over the drainpipe and cemented in place therewith,and having an upwardly extending generally circular housing forreceiving a strainer plate, a gasket, and a removable cover.

The novel fitting can be employed with drainpipes of difierentdiameters, thus contributing to the standardization of suchfittingsandreducing the number of sizes which must be kept in stock.

The new fitting provides a relatively large bonding area as comparedwith previously known structures of this type, and thus assures securecementing in place; r

Another object of the invention is realized by the provision of a ventpipe attached to the removable cover ofthe'fitting for the purpose ofrelieving internalpressure; thus eliminating danger of damage to thefitting or to the floor, or both, as well as expenses for repair andinconvenience to the property owner.

These and additional objects and features will be brought out in thecourse of the detailed 9 Claims. (01. 182-31) description which isrendered below with reference to the accompanying drawings. In thesedrawings,

Fig. l' 'represent's an embodiment of the new fitting in elevation;

Fig. 2 illustrates a top view of Fig. 1;

Fig.3 i a cross-sectional view of the fitting and the drainpipe takenapproximately along ines 3-3 of Fig; 2; and

Fig. 4 shows a fragmentary view of the housing and cover approximatelyalong the sectional lines 4-4 in Fig. 2.

Like parts'are identified by like reference n11- merals throughout thedrawings.

Reference numeral ll indicates the upper end of a drain-pipe which mayconnect, for example, with the sewer. The drainpipe is sunk in the fioorl3 and is provided with a flange l2 which may be part of the drainpipeor may be attached to it in any approved and suitable manner. Thefitting may be provided for a drainpipe of a cer-' tain diameter, butmay also be used in connection withdrainpipes of smaller diameter. Inthe first case-the flange l2 may be part of the drainpipe, andin--the'latter case the flange may be suitably 'attached'toit. 1 Thedrainpipe with its flange extends through the cement l3, forming thefloor, near the upper surface thereof.

The new drain fitting is made in the form of a tubular shell comprisinga lower generally circular section 14 depending downwardly in the formof askirt or apron and a section l5 forming a housing and extendingupwardly therefrom. The two sections form a central annular portion l6,providing at ll aseat for engagement with theflangel2 of the drainpipe.The upper section15 0f the fitting comprises the generally circularportion I8 which is of smaller diameter than the apron l4 and isprovided with two oppositely disposed radially extending enlargements l9and 20. At the'juncture'of the upper and lower sections of the fittingis formed the shoulder-ZLHThe fitting isplaced on the drainpipe,

as illustrated in- Fig. 3, .with the flange l2 en- 0 gagin the seat H,and is cemented in place with the drainpipe. If desired or necessary, a

washer-like gasket'or gasketsmay be inserted tion of the fitting formingthe skirt or apron l4 tapers inwardly, as shown, so as to facilitate theinsertion and placement of the structure. The upper end of the housingsection it of the fitting is disposed on a level with the surface of thecement floor Q3. The fitting presents a large bonding area. Itsdisplacement upwardly is prevented by the shoulder 25, while its angularplacement is secured by the enlargements l9 and 2d radially extendingfrom the upper housing section l5.

An orificed strainer plate or grid having ribs such as indicated at 22is placed in the shallow circular well formed by the central section idof the fixture. A suitable gasket 23 is placed above the grid into theshallow annular rim formed above the well containing the strainer plateor grid.

The radially projecting enlargements iii-and dially from the edge or thecircular cover Theselugs or projections 2i; and El are tapered, asparticularly shown in Fig. 4,'for locking engagement with the taperedunder side of the locking slots such as The action of the lugs 26 and2'! with respect to the locking slots is well known from so-calledbayonet joints.

The cover 255 may be a cast structure and, imilarly, the fitting may bea cast structure. cover 23 may he provided with downwardly extending,hollowed-out portions, indicated in Fig. 2 at 3B and for the purpose offorming radial ribs 32 and to facilitate the rotation required incidentto insertion and removal of the cover.

The vent pipe may be screwed nto the cover, shown in lie, 3, and may besecured thereto by means of a nut and a washer The pipe extends upwardlyand may be furnished in length requ red for any given conditionsindicated by experience. For example, if the highest level to which abasement may be flooded is two feet, the vent pipe required will measurejust a little over two feet; or if experience indicates that backpressure in the sewer may lift the contents of the drainpipe by say, twofeet, a vent pipe measuring a little over two feet in length will besufficient. The upper free end of the vent pipe 33 may be squared, asindicated at St, for the purpose of operating the lid or cover 28 bymeans of a wrench or the like, thus eliminating the necessity ofremoving the lid for draim age by the operation of the cover itself.

The operation of the drain fitting will be apparent from the abovedescription, but may be summarized as follows:

Once the fitting is put in place, as indicated in the figures, it isready for operation. In ternal pressure is relieved through the ventpipe 33 and the drain-pipe contents ma rise in this vent pipe. Damage tothe floor or to the fitting, or'to both, which may otherwise result frompressure in the sewer system, is thus avoided. Water may accumulate inthe basement above the fixture and around the vent pipe When draining isthe lid or cover '28 is re moved by twisting it in counter-clockwisedirection, as seen in Fig. 2, to remove the lugs 25 and 2? fromengagement with their locking slots in the enlargements i9 and Eil,whereupon the lid and the vent pipe are lifted out. The water then flowsinto the drainpipe ll through the apertures between the ribs 22 in thestrainer plate or The grid. Debris collecting above the grid may beremoved and the lid or cover 23 may then again be put in place by firstinserting the lugs 26 and 27 into the openings 2d and 25, and thenturning the lid or cover in clockwise direction, as seen in Fig. 2, soas to lock the lugs 26 and 2? in their respective slots such as 29,shown in Fig. 4.

Changes may be made within the spirit and scope of the following claimswhich define what is believed to be new and desired to have protected byLetters Patent of the United States.

I claim:

1. A house drain fitting of the class described, for coaction with adrainpipe sunk in the floor, comprising a generally circular tubularshell having a downwardly depending generally circular skirt disposedaround the upper end of said drainpipe and radially spaced therefrom anda tubular generally circular housing of smaller diameter than said skirtextending upwardly from said skirt and forming a peripheral annularshoulder therewith for anchoring said shell against axial upwarddisplacement, the upper edge of said housing being level with the floorsurface, said irt tapering downwardly and inwardly to facilitate theplacing thereof with respect to said drainpipe, and said housin beingprovided with enlargements radially outwardly projecting therefrom tosecure the fitting against gular displacement relative to saiddrainpipe.

The combination and structure defined in claim 1, together with anannular radially inwardly projecting flange in said fitting forming anaxially re d annular seat for centering engagement drainpipe.

3. The combination and structure defined in claim 1, together with anannular radially inwardly projecting flange in said fitting formll'lg anannular recess for receiving a strainer plate and also forming anannular shoulder for receiving a gasket, and cover for attachment tosaid housing in engagement \Vibh said gasket.

l. The combination and structure defined in claim 1, together with anannular radially inwardly projecting fiange in said fitting forming anannular recess for receiving a strainer plate and also forming anannular shoulder for receiving a gasket, a cover for attachment to saidhousing in engagement with said gasket, and means in the enlargementscarried by said housing for securing said cover.

5. The combination and structure defined in claim 1, together with anannular radially inwardly projecting flange in said fitting forming anannular recess for receiving a strainer plate and also forming anannular shoulder for receiving a gasket, a cover for attachment to saidhousing in engagement with said gasket, said cover being provided withlugs radially extending therefrom, and means in the enlargements carriedby said housing for securing said lugs to secure said cover.

6. In a house drain of the class described, the combination of adrainpipe sunk in the floor, with a tubular generally circular drainfitting surrounding the upper end of said drainpipe below the floorlevel, and an annular radiall inwardly projecting flange forming in saidfitting spacer means for engagement with the drainpipeship with saiddrainpipe and with its upper edge substantially level with the floor,said fitting consisting of a unitary generally circular tubular shellcomprising a lower tubular downwardly and inwardly tapering portion andan upper tubular housing portion of smaller diameter than said lowerportion to form an outer annular peripherally extending shoulder whichanchors the fitting in the floor against axial upward displacement, thedownward and inward taper of said lower portion of the shellfacilitating the placing of said fitting relative to said drainpipe, anda plurality of enlargem nts projecting radially outwardly from saidupper housing portion of the shell for anchoring said fitting in saidfloor against angular displacement relative thereto.

8. The structure and combination defined in claim 7, together with acover for said fitting, lug means extending radially from said cover,and a recess formed in each of said radially extending enlargements ofsaid housing portion for receiving an associated lug means of said coverfor the purpose of securing said cover on said fitting.

9. The structure and combination defined in claim 7, together with anannular flange projecting radially inwardly from the inner wall of saidshell, said flange forming a plurality of annular recesses, namely, (1)an annular downwardly racing recess for engagement with the top of saiddrainpipe, whereby said fittin is centered on the drain pipe and itsupper edge is aligned with the floor lever, (2) an annular intermediateupwardly facing recess for receiving a strainer, and (3) an annularupwardly facing top recess of larger diameter than said intermediaterecess for receiving an annular gasket and a cover in sealin engagementwith such gasket, a plurality of lug means forming part of said coverand radially projecting therefrom, and a recess formed in each of saidradially extending enlargements of said housing portion for receiving anassociated lug means of said cover for the purpose of securing the coveron said fitting.

SILVESTRO CAVALIERI.

REFERENCES CITED The following references are of record in the file ofthis patent:

UNITED STATES PATENTS Number Name Date 957,487 Berry May 10, 19101,305,767 Bythiner et a1 June 3, 1919 1,371,568 Mellon Mar. 15, 19211,914,780 Lichamer June 20, 1933

